Hello, LucyCR1989,
Thanks for using Apple Support Communities, it's great to have you here. We want to help you get Apple TV+ working again so you can get back to enjoying Ted Lasso!
We see that you mentioned following a how-to article, which is awesome to see. However, since it's always super important that all of our bases are covered, we want to share this link to be totally sure that you've followed the correct article for this issue. This is going to be the best place to start: If you can't watch or stream movies and TV shows in the Apple TV app - Apple Support
If that is the article you followed and the steps didn't do the trick, we have some more information to share with you below. Otherwise, go ahead and work through those steps and let us know if they do the trick!
Now, if that article didn't quite get things working again then we want to recommend that you get in touch with AppleCare directly. If support is available in your region, this will allow you to work directly with an AppleCare Advisor who can get some more information on this issue with you and go through any further troubleshooting steps available. You can start by reaching out here: Contact Apple Support
We hope that this information is helpful.
Have a great day!